Malicious PDF — malware analysis report

Static analysis result for SHA-256 549ee4a23cb7feb7…

MALICIOUS

PDF

18.3 KB
MD5: 6de2940f0434cd929e32d751116d0cf6 SHA-1: 58778c8b0ad62d3ee30efbdcaf5f13c6a925deb6 SHA-256: 549ee4a23cb7feb79c0038c680cbb842da3451ac0353f19b3b86aa66659dffb3
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file utilizes XFA forms, a known vector for exploitation. Critical heuristics indicate the presence of embedded script payloads and ClamAV detections (Pdf.Exploit.Agent-36789 and Pdf.Exploit.Agent-36809) strongly suggest malicious intent. The embedded URL, while not directly actionable, is part of the document's structure.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36789
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.x&#102;a.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000325.bin
76f828554227bf64d115b23276cb0ff9dcd1b75d49b791b4d5d942829e7ee400
pdf-embedded-script PDF raw stream script payload at offset 0x325 17968 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely